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/*
* CORE Semaphore Handler
*
* DESCRIPTION:
*
* This package is the implementation of the CORE Semaphore Handler.
* This core object utilizes standard Dijkstra counting semaphores to provide
* synchronization and mutual exclusion capabilities.
*
* COPYRIGHT (c) 1989-1999.
* On-Line Applications Research Corporation (OAR).
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rtems.com/license/LICENSE.
*
* $Id$
*/
#include <rtems/system.h>
#include <rtems/score/isr.h>
#include <rtems/score/coresem.h>
#include <rtems/score/states.h>
#include <rtems/score/thread.h>
#include <rtems/score/threadq.h>
#if defined(RTEMS_MULTIPROCESSING)
#include <rtems/score/mpci.h>
#endif
/*PAGE
*
* CORE_semaphore_Initialize
*
* This function initialize a semaphore and sets the initial value based
* on the given count.
*
* Input parameters:
* the_semaphore - the semaphore control block to initialize
* the_semaphore_attributes - the attributes specified at create time
* initial_value - semaphore's initial value
*
* Output parameters: NONE
*/
void _CORE_semaphore_Initialize(
CORE_semaphore_Control *the_semaphore,
CORE_semaphore_Attributes *the_semaphore_attributes,
unsigned32 initial_value
)
{
the_semaphore->Attributes = *the_semaphore_attributes;
the_semaphore->count = initial_value;
_Thread_queue_Initialize(
&the_semaphore->Wait_queue,
_CORE_semaphore_Is_priority( the_semaphore_attributes ) ?
THREAD_QUEUE_DISCIPLINE_PRIORITY : THREAD_QUEUE_DISCIPLINE_FIFO,
STATES_WAITING_FOR_SEMAPHORE,
CORE_SEMAPHORE_TIMEOUT
);
}
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